A Modified Back EMF Observer Based Sensorless PV Array-Battery fed PMSM Drive for LEV with Improved INC Based MPPT Algorithm

This paper presents a solar-PV battery powered PMSM drive for light electric vehicle (LEV) application based on quasi-PR controller with feed forward phase locked loop (FF-PLL). Generally, for medium and high-speed range, back- EMF methods are used. A novel observer based on quasi-PR controller with FF-PLL is utilized for rotor position estimation. This observer is simple in structure and helps to reduce the chattering in the estimated back-EMF. In addition to this, to get maximum power from the roof-top solar PV panel of an EV is a big challenge. An improved variable step MPPT technique is used for getting peak power from rooftop solar PV panel. This algorithm improves the accuracy as well as tracking speed by adapting the step size after each iteration based on the maximum power point position. The obtained results validate the effectiveness of this method for EV application.